Type-writing machine.



No. 776,103. PATENTED NOV. 29, 1904. w. J. BARRON.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 27.1399.

H0 MODEL.

NVENTDF'E' TTURNEY s wem 2 I EW m WH H. M

NITED STATES Patented November 29, 1904:.

PATENT OFFICE.

WALTER J. BARRON, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE DENSMORETYPEWRITER COMPANY, OF SYRACUSE, NEW YORK, A

CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 776,103, dated November29, 1904.

Application filed June 27, 1899. Serial No. 722,000. (No model.)

To all whom 217; may concern: Be it know n that I, WALTER J. BARRON, acitizen of the United States, and a resident of the borough ofBrooklymin the city of New York, in the county of Kings and State of NewYork, have invented certain new and useful Improve-- ments in Type-Writin g Machines, of which the following is a specification.

The present invention relates to type-actuating mechanism fortype-writing machines,

the primary object of the invention being to relieve the finger of shockin the act of manipulating the key, especially the shock incidental tothe impact of the type against the platen.

To these and other ends the invention includes features of constructionand combinations of devices hereinafter described, and more particularlypointed outin the appended claims.-

The preferred form of the invention is illustrated in the accompanyingdrawings, forming part of this specification, in which" Figure 1 is acentral vertical longitudinal sectional view of a type-writing machinein which the invention is embodied, certain of the parts being omittedfor the sake of clear-' ness. Fig. 2 is an enlarged detail view, andFig. 3 is a detail View, of a modification.

1n the several views the same part will be found designated by the samenumeral of ref- 1 indicates a base-frame of suitable construction; 2,standards rising from the frame 1; 3, a top plate or type-ring securedto the standards 2; 4, carriage guide rods or tracks secured to the topplate 3; 5, a carriage of the usual construction running upon the tracks4; 6, a platen-carrier connected to the carriage 5 in any suitable way;7, a platen journaled in the carrier 6; 8, a guide-roller at the frontof the platen-carrier 6 and running upon a guide and shift rail 9; 10, arack pivotally connected with the carriage 5 at 11; 12, a toothed wheelengaging with the rack 13, a shaft on which the wheel 1.2 is fast; 14, abearing for the shaft 13; 15, a ratchet-wheel connected with the shaft13 in any usual or suitable manner, as by a backing-ratchet in a casing16.

17 and 18 are escapement-dogs carried by a rocker-arm 19 and connectingwith the ratchet or rack 20, aroclr-shaft to which the arm 19 is fast;21, a spring for rocking the shaft 20 and arm 19 rearwardly; 22, an armextending forwardly from the shaft 20 and carrying a transverse bar 23;24, one of two rods connected with the bar 23 and supporting theuniversal bar 25; 26, keydevers provided with notches in their upperedges at near their rear ends and fulcrumed upon a rib 27, extendingdownwardly from the top of the base-frame 1; 28,springs secured to atransverse bar 29 of the frame and normally retaining the key-levers 26in their upper positions against the stop 30; 31, a spring-drum; 32, astrap connecting the spring-drum with the carriage 5; 33, a space-keybar at the front of the keyboard; 34, type-bar hangers secured to thetop plate 3 by screws 36, type-bars journaled in the hangers 34.

The foregoing devices are or may be of any suitable or knownconstruction.

37 is a rod pivotally connected at its upper end to anarm of thetype-bar 36 and provided at its lower end with screw-threads 38.

40 is a rod pivotally connected at 41 to a strap 42 on a key-lever 26and is provided with an eye 43, through which the threaded end of therod 37 passes freely. The rod 37 is provided with one or more nuts 44above the eye 43, said nuts being adjustable along the threaded portion38 of the rod, and also with one or more nuts 45 below the said eye andlikewise adjustable.

46 is a spiral spring surrounding the rod 37 and abutting against thenut 45 and the lower side of the eye 43. By preference the nuts 44 and45 are at such a distance apart upon the rod 37 as will secure that thespring 46 shall be under no strain, (compression in the form of theinvention illustrated in the drawings,) and for this reason I have shownthe nut 44 as being at some little distance from the eye 43, though itis not essential that there should be any separation between the two.

By preference the spring 46 is of such strength that it will not bematerially compressed in the operation of starting a type toward theplaten by a stroke upon a finger-key 26 but will yield to the continuedor surplus pressure of the finger upon the key after the impact of thetype, as indicated in the dotted lines in Fig. 1. In this manner anelastic touch at the beginning and end of the stroke upon a key issecured and shock to the finger is avoided. Upon the release of thedepressed key the springs 28 and 4:6 quickly return the same to normalposition, and the return of the typebar to normal position by its weightmay be hastened by the sudden abutment of the eye 43 against the nut 4A.

In the modification illustrated at Fig. 3 above the lower check-nut 45is provided a sleeve 47, which is spirally cut on the exterior at 48,into which spiral the lower end of the spring 46 is forced, thussecurely holding the spring in position relatively to the rod 37 andproviding for its accurate adjustment as a to strength by turning itfarther onto or ofi of the sleeve 47.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a type-writing machine, the combination of a platen, a pivotedtype-bar, an actu ating-rod pivoted to said type-bar, a second pivotedrod slidably connected at its free end to the free end of thefirst-mentioned rod, a

spring interposed between the ends of said rods, and a key-lever foractuating the several parts, the construction and arrangement being suchthat when the key-lever is depressed, the spring remains substantiallyunaffected until the type-bar strikes the platen, whereupon the springis compressed to cushion or relieve the finger of shock.

2. In a type-writing machine, the combination of a platen, a type-bar, akey, a rod pivotally connected with the type-bar at one end and having ascrew-thread at its other end, an eye-bar connected with the key, thesaid rod passing through the said eye, a nut engaging the threaded endof said rod and provided with a spiral groove, and a spiral springfrictionally engaging said groove at one end ans} abutting against thesaid eye at the other en Signed in the borough of Manhattan, in the cityof New York, in the county of New York and State of New York, this 21stday of June, A. D. 1899.

WALTER J. BARRON.

Witnesses:

K. V. DONOVAN, A. C. VAN BLAnoon.

